HO2S heater control

Fig 1: HO2S Heater Control Waveform Graph

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 2B(+)-body ground(-)

Oscilloscope setting 

• 5 V/DIV (Y), 1 s/DIV (X), DC range

Vehicle condition 

• Idle (immediately after starting the engine)